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    1．A new study in West Africa shows how farm irrigationsystems powered by the sun can pro-duce more food and money for villagers． The study-in Benin found that solar-powered pumpsare effective in 8upplying water，especially during the long dry season．
        Sub-Saharan Africa is the part of the world with the least food security． The United Na-tions Food and Agriculture Organization estimates that more"than one biillion of the world's peo-ple faced hunger last year．Around 265 million of them live'south of the Sahara Desert：Lack of  rainfallis one oftheir main causes offood shortages．．
        Jennifer Bumey from Stanford University in Califomia led the study．The research team helped build three solar-powered drip irrigation-（滴灌），systems in northem Benin． Between 30 and 35 women used each system to pump water from the ground or a stream．Each woman was responsible for farming her own 120 sqrurre meters of land． They also farmed other land  collectively．
        The solar-powered irrigation systems produced an average of nearly two tons of vegetables per montb． During the first year，the women．kept a monthly average of almost rune kilograms of vegetables for home use．They sold the surplus produce at local markets． The eamings greatly increased their ability to buy food during the dry season which can last six to nine months． Peo-ple in the'two villages with the systems were able to eat three to five more servingsof yegetables per day．But making the surplus available at markets also had a wider effect．
        The study compared the villages with two others where women farmed with traditional methods like carrying water in buckets． The amount of vegetables eaten in those villages also  increased，though not as much．The researchers note that only four percent of the croplamd in sub-Saharan Africa is irrigated． Using solar power to pump water has higher costs at first． But    the study says it can be more economical in the long term than using fuels like gasoline，diesel  or kerosene． And solar power is environmentally friendly．
    66．Food security in Sub-Saharan Africa is insufficient mainly because ofA
    A．lack of rainfall                 B．limitation of farmland
    C． a small crop variety            D．little sunLight
    67．From the third paragraph we know that．B
    A．water is wasted by using the system
    B． the farmers imgate the land together
    C． all farmers use irrigation systems in northem Benin
    D． the solar-powered systems take up more manpower
    68．The underlined word"surplus"in the 4th paragraph most probably meansC
    A．special       B．unnecessary    C．extra．     D．abandoned
    69．Usinf．solar power to pump water has advantages EXCEPT thatA
    A．solar energy has higher cost at first
    B．solar power helps to protect environment
    C．solar power helps farmers increase eanungs
    D． solar energy can be more economical in the long run
    70．What can be the best title for the text？C
    A．Manpower affects rainfallin Africa
    B．Irrigation by carrying water in buckets
    C．Solar-powered pumps aid African farmers
    D．Vegetable supply increased in African villages．

    分析 本文主要讲述太阳能水泵帮助非洲村民生产更多的粮食并且给他们带来了很多的收入．

    解答 ABCAC
    66   A   细节题． 根据文章第二 段Lack of rainfallis one oftheir main causes offood shortages．．可知撒哈拉以南的非洲食物不能保障的原因是雨水的缺乏，故选A．
    67   B   细节题． 根据文章第三 段 They also farmed other land collectively．可知她们还养殖其他集体土地．故选B．
    68   C    猜测词义题．  根据文章第四 段They sold the surplus produce at local markets． 可知她们还把多余的农产品在当地的集市上卖，故选C．
    69    A   细节题． 根据文章最后一段Using solar power to pump water has higher costs at first． 可知使用太阳能抽水最初成本比较高，这不是一个优点，故选A．
    70   C     主旨大意题．  通读全文可知本文主要讲述太阳能水泵帮助非洲村民生产更多的粮食并且给他们带来了很多的收入．

    点评 学生需要认真阅读原文，把握文章大意，对文章脉络有整体的了解，能仔细查找文中细节，并能根据文章内容进行合理的推测判断．

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    B．Little by little，one goes far．
    C．Every coin has two sides．
    D．Well begun，half done．
    24．Which of the following can best describe the author？A
    A．Caring and determined．
    B．Honest and responsible．
    C．Ambitious and sensitive．
    D．Innocent and single-minded．

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